And there you have it – an easy to use, flexible and customisable calendar. Using the above css should result in something that looks like this:

Many other options can be easily added, for example in our Doozy CMS events module we include clickable links on days that have events along with an optional summary of events for the selected month below the calendar.

I definitely don’t recommend using this technique for hiding anything at all sensitive, but if you have a situation where you want certain content to be available or presented in a certain way to people who have a password but not the general public, this one line of code will do the trick:

<?php
$hidden_stuff = 'This could be text, data obtained from a database or whatever else you like or simply used to format the page in a certain way...';
echo (strpos($_SERVER['QUERY_STRING'], 'sneakypassword') !== false ? '<p>' . $hidden_stuff . '</p>' : '<p>Stuff that anybody can see.</p>');

People who are allowed to view the hidden content don’t need to log in – all they need to do is add the password to the URL as a querystring.

eg: http://yoursite.com/pagewithhiddenstuff.php?sneakypassword

There are plenty of good reasons not to do this:

The password is visible in the URL so can be seen by others nearby

It is more susceptable to brute force password attacks than a posted password

The password will be bookmarked if the page is

The password will be cached or logged if the page is

On the other hand, it can have it’s uses. I personally use this exact technique for dummy lorem ipsum text generation for website testing. I have a page that generates random words in a format suitable for pasting straight into a visual text editor, if I add a ?p to the url, it wraps the paragraphs in <p> elements, if I add ?ul or ?ol it outputs it as an unordered or ordered list.